Antiperspirant creams containing volatile silicones

ABSTRACT

Antiperspirant cream compositions, comprising:     (a) from about 5% to about 60% of a volatile silicone oil (b) from about 0.1% to about 60% of a non-volatile emollient having a viscosity of at least about 10 cs at 25 DEG C; (c) from about 2% to about 10% of a particulate thickening material; and (d) from about 15% to about 45% of a particulate antiperspirant active material; and (e) from about 0.1% to about 10% of a particulate cellulose ether polymer, wherein the compositions have penetration force values of from about 150 grams to about 800 grams at 25 DEG C and at 50% relative humidity. These compositions preferably contain a cosmetic powder material, at a level of from about 2% to about 20%. This invention also provides methods for making these compositions.

BACKGROUND OF THE INVENTION

The present invention relates to cosmetic cream compositions containingan antiperspirant active material. In particular, it relates toantiperspirant creams, and methods for making such compositions, withimproved stability, efficacy, cosmetic and wash-off characteristics.

Compositions designed to stop or reduce the flow of perspiration arewell known in the cosmetic and chemical literature. Antiperspirantstypically contain an astringent material, such as an astringent aluminumor zirconium salt. These compositions are designed to deliver the activeto the skin in an effective form, while being cosmetically acceptable.

A variety of methods have been used to apply antiperspirant compositionsto the skin. For example, sprays, roll-ons, creams and stickcompositions are commonly used. Such formulations are described in S.Plechner, "Antiperspirants and Deodorants" 2 Cosmetics, Science andTechnology 373-416 (M. Balsam and E. Sagarin, editors, 1972).

Cream emulsions are also described, for example, in U.S. Pat. No.4,268,499, Keil, issued May 19, 1981, and Australian patentspecification No. 8,430,026, published Jan. 3, 1985. Anhydrous creams,in gel form, are described, for example, in U.S. Pat. No. 4,083,956,Shelton, issued Apr. 11, 1978, and European patent application No.135,315, Kasat, published Mar. 27, 1985.

Cream formulations, in general, have been less popular than otherantiperspirant product forms. For example, some cream compositions maybe sticky and produce aesthetically undesirable levels of residue on theskin. Creams may lso be "messy" and otherwise difficult to apply.Special packages and dispensers have been designed to reduce suchapplication negatives. However, cream formulations known in theliterature may be unacceptable for delivery from such dispensers.

It has been found that the antiperspirant creams of the presentinvention containing selected emollients and thickening materials havegood application characteristics and very good efficacy while havinggood aesthetic and cosmetic characteristics. In particular, suchcompositions are stable, allowing use in cream dispensers. Suchcompositions also have good rheology during application, very goodefficacy, and leave low levels of visible residue on the skin.

SUMMARY OF THE INVENTION

The present invention provides antiperspirant cream compositions,comprising:

(a) from about 5% to about 60% of a volatile silicone oil;

(b) from about 0.1% to about 60% of a non-volatile emollient having aviscosity of at least about 10 cs at 25° C.;

(c) from about 2% to about 10% of a particulate thickening material; and

(d) from about 15% to about 45% of a particulate antiperspirant activematerial; and

(e) from about 0.1% to about 10% of a particulate hydrophilic polymer,

wherein said compositions have penetration force values of from about150 g to about 800 g at 25° C. and at 50% relative humidity. Thesecompositions preferably contain a cosmetic powder material, at a levelof from about 2% to about 20%. This invention also provides methods formaking these compositions.

DESCRIPTION OF THE INVENTION

The antiperspirant cream compositions of this invention contain fiveessential ingredients: a volatile silicone oil, a non-volatileemollient, a particulate thickening material, an antiperspirant activeand a hydrophilic polymer. They may also contain certain optionalcomponents, such as (for example) cosmetic powders, colorants, perfumesand emulsifiers. The essential and optional components to be included inthese creams must be "cosmetically acceptable", i.e., safe for human useand aesthetically acceptable at the levels encompassed by the presentinvention, at a reasonable risk/benefit ratio.

These compositions (herein "antiperspirant creams") encompass anysemi-solid composition that is suitable for depositing antiperspirantmaterial on human skin. The creams of this invention have a penetrationforce value of from about 150 grams (g) to about 800 g, preferably fromabout 200 g to about 550 g at 25° C. and at 50% relative humidity, asmeasured with a Stevens Texture Analyzer, manufactured by C. Stevens &Sons, Ltd. (This value is the force required to move a standardized 2centimeter diameter disk through the product, for a distance of 15millimeters, at a rate of 2 millimeters/second.)

In particular, the antiperspirant creams of this invention comprise:

(a) from about 5% to about 60% of a volatile silicone oil;

(b) from about 0.1% to about 60% of a non-volatile emollient having aviscosity of at least about 10 cs at 25° C.;

(c) from about 2% to about 10% of a particulate thickening material; and

(d) from about 15% to about 45% of a particulate antiperspirant activematerial; and

(e) from about 0.1% to about 10% of a particulate hydrophilic polymer,

wherein said compositions have a penetration force value of from about150 g to about 800 g at 25° C. and at 50% relative humidity. (As usedherein, all percentages are by weight of total composition.)

Preferably, these creams contain from about 20% to about 60% off thevolatile silicone oils, more preferably from about 30% to about 50%. Thenon-volatile emollient is preferably present at a level of from about12% to about 30%, more preferably from about 15% to about 25%.

The particulate thickening material is preferably present at a level offrom about 2% to about 7%, more preferably from about 2.8% to about4.5%. The particulate hydrophilic polymer is preferably present at alevel of from about 0.25% to about 5.0% and most preferably from about1.0% to about 3.0%. Also preferably, the antiperspirant active materialis present at a level of from about 20% to about 30%. The total level ofall particulate materials (including the thickening material, theantiperspirant active material, and any optional materials inparticulate form) is preferably from about 20% to about 50%, morepreferably from about 30% to about 50%, more preferably from about 32%to about 40%. As used herein "particulate" materials are solid materialsthat are substantially insoluble in the volatile silicone oils andnon-volatile emollients of the cream composition. The components of theinvention are described in detail below.

Essential Components

Volatile Silicone Oil:

The antiperspirant compositions of this invention contain one or morevolatile polyorganosiloxanes, which may function as a liquid emollient.(As used herein, "volatile" refers to those materials which have ameasurable vapor pressure at ambient conditions.) The volatilepolyorganosiloxanes useful herein may be cyclic or linear. A descriptionof various volatile silicones is found in Todd, et al., "VolatileSilicone Fluids for Cosmetics", 91 Cosmetics and Toiletries 27-32(1976), incorporated by reference herein.

Preferred cyclic silicones include polydimethylsiloxanes containing fromabout 3 to about 9 silicon atoms, preferably containing from about 4 toabout 5 silicon atoms. Preferred linear silicone oils include thepolydimethylsiloxanes containing from about 3 to about 9 silicon atoms.The linear volatile silicones generally have viscosities of less thanabout 5 centistokes at 25° C., while the cyclic materials haveviscosities of less than about 10 centistokes. Examples of silicone oilsuseful in the present invention include: Dow Corning 344, Dow Corning345, and Dow Corning 200 (manufactured by the Dow Corning Corporation);Silicone 7207 and Silicone 7158 (manufactured by the Union CarbideCorporation); SF1202 (manufactured by General Electric); and SWS-03314(manufactured by Stouffer Chemical).

Non-volatile Emollient:

The present antiperspirant compositions contain a non-volatile emollienthaving a viscosity of at least about 10 centistokes (cs), at 25° C. Thenon-volatile emollient may consist of a single emollient, or a mixturehaving an overall viscosity of at least about 10 cs. Preferably, thenon-volatile emollient has a viscosity of from about 100 cs to about 500cs, more preferably from about 200 cs to about 500 cs.

Non-volatile emollients useful herein include fatty acid and fattyalcohol esters, nearly water-insoluble ethers and alcohols,polyorganosiloxanes, and mixtures thereof. Such emollients are describedin 1 Cosmetics, Science and Technology 27-104 (M. Balsam and E. Sagarined. 1972), and U.S. Pat. No. 4,202,879, Shelton, issued May 13, 1980(both incorporated by reference herein).

The present compositions preferably contain a non-volatile silicone oilas an emollient material. Such silicone oils include polyalkylsiloxanes,polyalkyarylsiloxanes, and polyethersiloxane copolymers. Such polyalkylsiloxanes include the Vicasil series (sold by General Electric Company)and the Dow Corning 200 series (sold by Dow Corning Corporation).Polyalkylaryl siloxanes include poly methylphenyl siloxanes havingviscosities of from about 15 to about 65 centistokes at 25° C. These areavailable, for example, as SF 1075 methylphenyl fluid (sold by GeneralElectric Company) and 556 Cosmetic Grade Fluid (sold by Dow CorningCorporation).

Particulate Thickening Material:

The compositions of this invention contain one or more materials whichform a semi-solid cream formulation (as described above) with the otheressential components. Such materials include colloidal silicas,silicates, and mixtures thereof. These materials preferably form a creamhaving a gel-like, shear-thinning matrix when used in the manner of thisinvention.

Silicates useful herein include, for example, montmorillonite clays andhydrophilically treated montmorillonites, e.g., bentonites, hectoritesand colloidal magnesium silicates. When silicates are used as thethickening material of the present creams, they are preferably presentat a level of from about 5% to abut 10%. Commercially-availablesilicates useful herein include, for example, the "Bentone" series ofhydrophobic bentonites, manufactured by NL Industries, Inc.

When hydrophobically-treated bentonites are used as the thickeningmaterial, the creams of this invention also preferably contain agel-promoting agent. Gel-promoting agents useful herein include, forexample, water, lower alcohols (such as ethanol), acetone, propylenecarbonate, and mixtures thereof. Such materials are preferably includedat a level of from about 1% to about 3%, more preferably from about 1.5%to about 2.5%.

A preferred thickening material useful herein is finely divided silica,or "colloidal silica", which is comprised of micron to sub-micron sizedsilica particulates, with high surface areas (preferably greater thanabout 100 square meters per gram of material). Preferably, the colloidalsilica material is less than about 1 micron in size. Also preferably,the silica material used in the present compositions is a fumed silica.

Fumed silicas can generally be described as fluffy, white, superfinepowders of extremely low bulk density but having high surface areas.These fumed silicas are typically made by a vapor phase process thatproduces colloidal silica by the hydrolysis of silicon tetrachloride ata very high temperature. These materials typically consist of about99.8% silicon dioxide by weight (on a moisture free basis), existing inthree dimensional branched chain aggregates, with a surface that ishydrophilic and capable of hydrogen bonding. Such silicas have surfaceareas ranging from about 2.5 to about 1,200 square meters per gram.Colloidal silica materials are described in Hardy, et al., "The Use ofFumed Silica in Cosmetics", 2 Cosmetic Technology 35 (1980)(incorporated by reference herein) and R. Iler, The Chemistry of Silica(1979).

Colloidal silica materials among those useful herein are available froma variety of sources, including Syloid silicas (manufactured by DavisonChemical Division of W. R. Grace), Cab-O-Sil (manufactured by CabotCorporation), and Aerosil (manufactured by Degussa A. G.). Cab-O-Sil isa preferred commercially available colloidal silica useful herein, witha surface area ranging from about 200 to about 400 square meters pergram.

Particulate Antiperspirnt Material:

The particulate antiperspirant materials of this invention comprise anycompound or composition or mixtures thereof, having antiperspirantactivity. Astringent metallic salts are preferred antiperspirantmaterials for use herein, particularly including the inorganic andorganic salts of aluminum, zirconium and zinc, and mixtures thereof.Particularly preferred are the aluminum and zirconium salts such asaluminum halides, aluminum hydroxy halides, zirconyl oxide halides,zirconyl hydroxy halides, and mixtures thereof.

Preferred aluminum salts include those of the formula

    Al.sub.2 (OH).sub.a Cl.sub.b.sup.· xH.sub.2 O

wherein a is from about 2 to about 5; a+b=6; x is from about 1 to about6; and wherein a, b, and x may have non-integer values. Particularlypreferred are aluminum chlorhydroxides referred to as "5/6 basicchlorhydroxide", wherein a=5, and "2/3 basic chlorhydroxide," whereina=4. Processes for preparing aluminum salts are disclosed in thefollowing documents, all incorporated by reference herein: U.S. Pat. No.3,887,692, Gilman, issued June 3, 1975; U.S. Pat. No. 3,904,741, Joneset al., issued Sept. 9, 1975; U.S. Pat. No. 4,359,456, Gosling, et al.,issued Nov. 16, 1982; and British patent specification No. 2,048,229,Fitzgerald, et al., published Dec. 10, 1980. Mixtures of aluminum saltsare described in British patent specification No. 1,347,950, Shin, etal., published Feb. 27, 1974 (incorporated by reference herein).

Zirconium salts are also preferred for use in antiperspirant creams ofthe present invention. Such salts are of the general formula

    ZrO(OH).sub.2-a Cl.sub.a.sup.· xH.sub.2 O

wherein a is from about 1.5 to about 1.87; x is from about 1 to about 7;and wherein a and n may have non-integer values. These zirconium saltsare disclosed in Belgium Pat. No. 825,146, Schmitz, issued Aug. 4, 1975,(incorporated by reference herein). Particularly preferred zirconiumsalts are those complexes also containing aluminum and glycine, commonlyknown as "ZAG complexes". Such ZAG complexes contain aluminumchlorhydroxide and zirconyl hydroxychloride of the formulae detailedabove. These compounds in ZAG complexes are disclosed in U.S. Pat. No.3,679,068, Luedders, et al., issued Feb. 12, 1974 (incorporated hereinby reference), and U.S. Pat. No. 4,120,948, Shelton, issued Oct. 17,1978 (incorporated by reference herein).

Also useful are the ZAG complexes disclosed in G.P. patent applicationNo. 2,144,992, Callaghan et al., published Mar. 20, 1985. These ZAGactives, when analyzed by high pressure gel permeation chrometography,exhibit a distribution pattern having four or more successive peaks or"bands" where the height ratio of Bands IV to III is greater than 2:1.

More preferred are ZAG actives which have a total area under the curveof bands I and II of less than about 10%, preferably less than about 5%,more preferably less than about 2% and most preferably less than about1%.

Hydrophilic Polymers:

The antiperspirant cream compositions of the present invention compriseat least one particulate hydrophilic polymer. The inclusion of thehydrophilic polymer assists in removal of the antiperspirant residue bywashing. Preferred hydrophilic polymers include cellulose ether polymers(cationic, neutral, and anionic), modified starches, polyamides,(especially polyacrylamides), and polypeptides, as disclosed generallyin Davidson, Handbook of Water-Soluble Gums and Resins, 1980.Preferably, the polymer is selected from non-ionic cellulose etherpolymers. Such cellulose ether polymers are disclosed in Davidson,supra, Chapters 4 and 12-13. More preferred are cellulose ether polymersselected from alkylcelluloses (e.g., methylcellulose),hydroxyalkylalkylcelluloses (e.g., hydroxypropylmethylcellulose;hydroxybutylmethylcellulose; hydroxyethylmethylcellulose;ethylhydroxyethylcellulose), hydroxyalkylcelluloses (e.g.,hydroxyethylcellulose; hydroxypropylcellulose), and mixtures thereof.Most preferred are hydroxyalkylcelluloses, especiallyhydroxyethylcellulose and hydroxy propylcellulose. The cellulose etherpolymers typically have molecular weights within the range of from about20,000 to about 5,000,000 and more typically within the range of fromabout 50,000 to about 500,000. Cellulose ether polymers are described in"Handbook of Water-Soluble Gums and Resins" (McGraw-Hill Book Co., N.Y.;1980; Davidson, editor), Chapters 3, 4, 12 and 13, the disclosures ofwhich are incorporated herein by reference in their entirety.

The cellulose ether polymers to be utilized herein bind to polarsolvents such as water and ethanol. However, as utilized in theantiperspirant compositions herein, these polymers are exposed to verylittle if any polar solvents. Furthermore, the cellulose ether polymersutilized herein are not dissolved in the antiperspirant composition butrather are distributed throughout the composition in particulate form.It is preferred that the particle size be small to prevent theantiperspirant composition from having a "gritty" feel. Preferably, theparticle size is from 1 to about 500 microns, more preferably from about1 to about 100 microns, and mst preferably from about 15 to about 75microns. In the case of non-spherical particles, the longest dimensionof the particles is considered for these preferred limits.

Representative examples of preferred cellulose ether polymers useful inthe compositions of the present invention are: hydroxyethylcellulose(Natrosol 250M sold by Hercules Chemical Co.); hydroxypropylcellulose(Klucel sold by Hercules Chemical Co.); methyl cellulose (Methocel-Asupplied by Dow Chemical Co.); and poly(ethylene oxide) (Polyox sold byUnion Carbide Corp.). Most preferred is hydroxyethylcellulose.

The hydrophilic polymers in total typically comprise from about 0.1% toabout 10% by weight of the compositions of the present invention, morepreferably from about 0.25% to about 5%, and most preferably from about1% to about 3%.

Non-essential Components

The compositions of the present invention may also contain optionalcomponents which modify the physical characteristics of the vehicles, orserve as "active" components when deposited on the skin in addition tothe particulate antiperspirant material. Additional active componentsinclude bacteriostats and fungistats. The particular non-activecomponents that may be useful will depend upon the form of applicationthat is desired. Such components include, for example, emollients,colorants, perfumes, powders, and emulsifiers. Optional componentsuseful herein are described in the following documents, all incorporatedby reference herein: U.S. Pat. No. 4,049,792, Elsnau, issued Sept. 20,1977; Canadian Pat. No. 1,164,347, Beckmeyer, et al., issued Mar. 27,1984; European patent specitication No. 117,070, May, published Aug. 29,1984; and Geria, "Formulation of Stick Antiperspirants and Deodorants,"99 Cosmetics & Toiletries 55-60 (1984).

A preferred optional component is a cosmetic powder (or mixture ofpowders), incorporated at a level of from about 2% to about 20%,preferably from about 2% to about 10%. Preferred cosmetic powders usefulherein include "inert spherical particulate materials" having a meandiameter of at least about 10 microns.

The "spherical particulate materials" are preferably essentially free of(i.e., containing less than 2% by weight of material) particulateshaving diameters greater than about 150 microns. Also preferably, theparticles have a mean diameter of from about 15 microns to about 75microns. Commercially-available inert particulate materials among thoseuseful herein may be of a non-uniform size distribution, containing someparticules outside the size ranges described herein. For the purposes ofthis invention, such non-uniform materials preferably have a meandiameter within the ranges described above.

Particularly preferred for use in the present invention is the inclusionof the inert spherical particulate materials in a ratio of particulatehydrophilic polymer to spherical particulate materials of from about10:1 to about 1:10, preferably 5:1 to about 1:5.

As referred to herein, "inert particulates" are those particulatescomprised of materials or mixtures of materials that are essentiallywater insoluble and which neither melt nor decompose nor react with thewax thickener materials, silicone oils or other components of theantiperspirant sticks, under the conditions of preparation and of use.Among the optional particulate materials that may be incorporated inthis invention include those comprised of polyolefins (such aspolystyrene, polyethylene, and polypropylene), nylon, waxes, Teflon®,insoluble cross-linked starches, and mixtures thereof.

Preferred inert particulate materials include those comprised ofpolyolefins, particularly polyethylene. Without being limited by theory,it is believed that these materials enhance the stability of theantiperspirant cream matrix by adding support to the matrix formed bythe particulate thickening material. Polyethylene materials, as well asparticulates made from other polyolefins, can be prepared by any ofseveral methods known in the art. (See, e.g., U.S. Pat. No. 2,825,721,Hogan, et al., issued Mar. 4, 1958.) Polyethylene polymers with lowmolecular weights such as 1,500 to 3,000, as well as polymers of suchhigh molecular weights as 35,000 to 100,000, may be used. One suchpolyethylene powder useful in this invention is Microthene®,manufactured by U.S.I. Chemicals, having a mean particle diameter offrom about 14 to about 20 microns. Among other commercially-availablematerials useful herein are 3M Glass Bubbles (soda-lime borosilicateglass spheres sold by 3M Company) and Miralite® (low densitypolyvinylidene chloride hollow microspheres, of approximately 30 micronsmean diameter, sold by Pierce & Stevens Chemical Corporation).

Other cosmetic powders useful herein include silicate powders (includingtalc, aluminum silicate, and magnesium silicate), modified cornstarches, metallic stearates, and mixtures thereof. Talc is described inK. S. Plotkin, "Cosmetic Talc" 11 C.T.F.A. Cosmetic Journal 13-16(1979), incorporated by reference herein. Commercially-available powdersinclude, for example, Veecote (anhydrous aluminum silicate, sold by R.T. Vanderbilt Company, Inc.) and Dry Flo (aluminum starch succinate,sold by National Starch and Chemicals Company).

Methods

A preferred method for making the antiperspirant creams of thisinvention generally comprises the steps of:

(a) admixing the essential and optional components of said creams, underlow-shear conditions, yielding a liquid mixture having a penetrationvalue of from about 15 grams to about 200 grams at 25° C. and at 50%relative humidity; and

(b) milling said liquid mixture, under high shear conditions, with adispersing disc at a disc tip speed of at least about 9 meters/second.

These processes may be batch processes (i.e., involving discreteprocessing steps) or continuous (i.e., wherein the product compositionis passed between processing steps in essentially continuousincrements). The equipment used in this preferred process iscommercially available.

The admixing step preferably involves first admixing the volatilesilicone oil and non-volatile emollient and any other liquid components.The thickening material is then added, followed by the antiperspirantactive material and particulate hydrophilic polymer and any otherparticulate components. Conventional blending equipment may be used.Preferably the penetration value of the mixture is from about 40 g toabout 175 g at 25° C. and a 50% relative humidity.

The high-shear milling step is preferably performed in a conventionaldispersing disc milling apparatus. The tip speed of the dispersing discis preferably from about 18 meters/second to about 22 meters/second. Themixture is preferably milled until a maximum penetration value isobtained, preferably at least about 200 g, preferably from about 300 gto about 400 g at 25° C. and at 50% relative humidity.

Creams of this invention may be packed in conventional antiperspirantcream containers, known in the art. Such packages typically contain thecream in bulk form. The cream is then applied by hand, or by a pad orsimilar applicator device. However, the present creams may also beprovided in other package dispensers, designed to extrude or otherwisedirectly apply the creams to the skin.

The following non-limiting examples illustrate the compositions,processes nd uses of the present invention.

EXAMPLE I

An antiperspirant cream, according to this invention, was madecomprising:

    ______________________________________                                        Component       % (by weight)                                                 ______________________________________                                        cyclomethicone (d5)                                                                           43.5                                                          dimethicone (350 cs)                                                                          20.0                                                          Cab-O-Sil HS-5.sup.1                                                                          4.0                                                           Microthene FN510.sup.2                                                                        3.0                                                           Natrosol.sup.3  2.0                                                           Reach AZ.sup.4  26.7                                                          fragrance       0.8                                                           ______________________________________                                         .sup.1 colloidal silica thickening material, sold by Cabot Corporation.       .sup.2 low density polyethylene powder, sold by U.S.I. Chemicals.             .sup.3 hydroxy ethyl cellulose, sold by Hercules, Inc.                        .sup.4 zirconium-aluminum-glycine hydroxychloride complex, particulate        antiperspirant active material, sold by Reheis Chemical Company.         

The cyclomethicone and dimethicone and perfume are added to a stainlesssteel mixing vessel. The Cab-O-Sil is then added, followed by theMicrothene and Natrosol and, finally, the antiperspirant active. Thecomposition is thoroughly stirred after addition of each particulatematerial.

The composition is then milled, using a Black & Decker Die Grinder(Model 4420, type 4) with a 6.35 cm diameter Cowles dispersing blade atapproximately 6000 rpm, for approximately 5 minutes. The penetrationforce value of the milled composition is approximately 300 grams at 25°C. and at 50% relative humidity.

An antiperspirant cream formulation, comprised as above, is applied tothe underarm area of a human subject, and reduces the perspiration inthe applied area.

EXAMPLE II

An antiperspirant cream, according to this invention, is madecomprising:

    ______________________________________                                        Component       % (by weight)                                                 ______________________________________                                        cyclomethicone (d5)                                                                           43.5                                                          dimethicone (350 cs)                                                                          20.0                                                          Cab-O-Sil HS-5.sup.1                                                                          4.0                                                           Microthene FN510.sup.2                                                                        3.0                                                           polyox.sup.3    2.0                                                           Reach AZ.sup.4  26.7                                                          fragrance       0.8                                                           ______________________________________                                         .sup.1 colloidal silica thickening material, sold by Cabot Corporation.       .sup.2 low density polyethylene powder sold by U.S.I. Chemicals.              .sup.3 poly (ethylene oxide), sold by Union Carbide Corp.                     .sup.4 zirconium-aluminum-glycine hydroxychloride complex, particulate        antiperspirant active material, sold by Reheis Chemical Company          

The cyclomethicone and dimethicone and perfume are added to a stainlesssteel mixing vessel. The Cab-O-Sil is then added, followed by theMicrothene and, finally, the antiperspirant active. The composition isthoroughly stirred after addition of each particulate material.

The composition is then milled, using a Black & Decker Die Grinder(Model 4420, type 4) with a 6.35 cm diameter Cowles dispersing blade atapproximately 6000 rpm, for approximately 5 minutes. The penetrationforce value of the milled composition is to be approximately 300 gramsat 25° C. and at 50% relative humidity.

An antiperspirant cream formulation, comprised as above, is applied tothe underarm area of a human subject, and reduced the perspiration inthe applied area.

EXAMPLE III

An antiperspirant cream, according to this invention, is madecomprising:

    ______________________________________                                        Component         % (by weight)                                               ______________________________________                                        cyclomethicone (d5)                                                                             44.3                                                        dimethicone (350 cs)                                                                            15.0                                                        Cab-O-Sil         4.0                                                         Natrosol          2.0                                                         Microthene        3.0                                                         talc              5.0                                                         ZAG antiperspirant active                                                                       26.7                                                        ______________________________________                                    

The antiperspirant cream is made by a method analogous to that describedin Example I. The penetration force value is approximately 520 at 25° C.and at 50% relative humidity.

EXAMPLE IV

An antiperspirant cream, according to this invention, is madecomprising:

    ______________________________________                                        Component         % (by weight)                                               ______________________________________                                        cyclomethicone (D4)                                                                             45.3                                                        dimethicone (350 cs)                                                                            20.0                                                        Cab-O-Sil         3.0                                                         Natrosol          2.0                                                         Microthene        3.0                                                         ZAG antiperspirant active                                                                       26.7                                                        ______________________________________                                    

The antiperspirant cream is made by a method analogous to that describedin Example I. The penetration force value is approximately 170 at 25° C.and at 50% relative humidity.

EXAMPLE V

An antiperspirant cream, according to this invention, is madecomprising:

    ______________________________________                                        Component         % (by weight)                                               ______________________________________                                        cyclomethicone (D4)                                                                             34.3                                                        dimethicone (350 cs)                                                                            20.0                                                        Cab-O-Sil         4.0                                                         Natrosol          3.0                                                         Microthene        12.0                                                        ZAG antiperspirant active                                                                       26.7                                                        ______________________________________                                    

The antiperspirant cream is made by a method analogous to that describedin Example I. The penetration force value is approximately 750 at 250°C. and at 50% relative humidity.

EXAMPLE VI

An antiperspirant cream, according to this invention, is madecomprising:

    ______________________________________                                        Component         % (by weight)                                               ______________________________________                                        cyclomethicone (D5)                                                                             39.8                                                        dimethicone (10 cs)                                                                             10.0                                                        Bentone 38.sup.1  3.0                                                         Cab-O-Sil         2.0                                                         Natrosol          2.0                                                         Microthene        6.0                                                         talc              5.0                                                         Veecote.sup.2     4.5                                                         ZAG antiperspirant active                                                                       26.7                                                        ______________________________________                                         .sup.1 hydrophobically-treated bentonite, manufactured by NL Industries,      Inc.                                                                          .sup.2 anhydrous aluminum silicate, manufactured by R. T. Vanderbilt          Company                                                                  

The antiperspirant cream is made by a method analogous to that describedin Example I. The penetration force value is approximately 350 at 25° C.and at 50% relative humidity.

What is claimed is:
 1. An antiperspirant cream composition,comprising:(a) from about 5% to about 60% of a volatile silicone oil;(b) from about 0.1% to about 60% of a non-volatile emollient having aviscosity of at least about 10 cs at 25° C.; (c) from about 2% to about10% of a particulate thickening material; (d) from about 15% to about45% of a particulate antiperspirant active material; and (e) from about0.25% to about 5% of a particulate hydrophilic polymer selected from thegroup consisting of cellulose ether polymers, polyamides, polypeptides,and mixtures thereof;wherein said composition has a penetration forcevalue of from about 150 g to about 800 g at 25° C. and 50% relativehumidity.
 2. An antiperspirant cream composition, according to claim 1,wherein said composition has a penetration force value of from about 200g to about 550 g at 250° C. and at 50% relative humidity.
 3. Anantiperspirant cream composition, according to claim 2, wherein saidcomposition has a total level of particulate of from about 20% to about50%.
 4. An antiperspirant cream composition, according to claim 3,wherein said volatile silicone oil is present at a level of from about30% to about 50%.
 5. An antiperspirant cream composition, according toclaim 4, wherein said non-volatile emollient is present at a level offrom about 15% to about 25%.
 6. An antiperspirant cream composition,according to claim 5, wherein said non-volatile emollient has aviscosity of from about 100 cs to about 500 cs.
 7. An antiperspirantcream composition, according to claim 6, wherein said non-volatileemollient is a polyorganosiloxane.
 8. An antiperspirant cream accordingto claim 7 wherein said hydrophilic polymer is a cellulose etherpolymer.
 9. An antiperspirant cream according to claim 8 wherein saidcellulose ether polymer is selected from the group consisting ofhydroxyethyl cellulose, hydroxypropyl cellulose and mixtures thereof.10. An antiperspirant cream composition, according to claim 7,additionally comprising from about 2% to about 20% of a cosmetic powdermaterial.
 11. An antiperspirant cream composition, according to claim10, wherein said cosmetic powder material is a spherical particulatematerial and is present at a level of from about 2% to about 10%.
 12. Anantiperspirant cream according to claim 11, wherein the ratio ofhydrophilic polymer to spherical particulate materials is from about 1:5to about 5:1.
 13. An antiperspirnt cream according to claim 12, whereinsaid hydrophilic polymer is a cellulose ether polymer.
 14. Anantiperspirant cream according to claim 13, wherein said cellulose etherpolymer is selected from the group consisting of hydroxyethyl cellulose,hydroxypropyl cellulose, and mixtures thereof.
 15. An antiperspirantcream composition, according to claim 7, wherein said particulatethickening material is a colloidal silica.
 16. An antiperspirant creamcomposition, according to claim 15 wherein said colloidal silica ispresent at a level of from about 2.8% to about 4.5%.
 17. Anantiperspirant cream composition, according to claim 14, wherein saidparticulate thickening material is a silicate.
 18. An antiperspirantcream composition, according to claim 17 additionally comprising agel-promoting agent.
 19. An antiperspirant cream composition, accordingto claim 18 wherein said silicate is present at a level of from about 5%to about 10%.
 20. An antiperspirant cream according to claim 7 whereinsaid particulate antiperspirant active material is a zirconium aluminumglycine complex.
 21. An antiperspirant cream according to claim 20wherein said zirconium aluminum glycine complex has a high pressure gelpermeation chromatography distribution pattern having four or moresuccessive bands wherein the total area under the curve of the first twobands is less than about 2%.
 22. An antiperspirant cream according toclaim 12 wherein said particulate antiperspirant active material is azirconium aluminum glycine complex.
 23. An antiperspirant creamaccording to claim 21 wherein said zirconium aluminum glycine complexhas a high pressure gel permeation chromatography distribution patternhaving four or more successive bands wherein the total area under thecurve of the first two bands is less than about 2%.
 24. A method formaking an antiperspirant cream composition of claim 1, comprising thesteps of:(a) admixing said volatile silicone oil, said non-volatileemollient, said particulate thickening material and said particulateantiperspirant active, under low-shear conditions, to form a liquidcomposition having a penetration force value of from about 15 g to about200 g at 25° C. and at 50% relative humidity; and (b) milling saidliquid mixture, under high shear conditions using a dispersing disk at adisc tip speed of at least about 9 meters/second.